Thramas Sector

The Thramas Sector is the Ultima Segmentum cube of the Thramas Crusade, the Eastern Fringe neighbourhood Horus sent the Night Lords to terrorise so the Lion could not reinforce Terra.

Aegis-subsector holds the Thramas System; Sheol, Serk, and a belt of agri-and-forge rocks share the chart. Curze and the Lion duelled across this map while Sevatar tried to hold a Legion together.

The Thramas Sector still matters as that Heresy breadbasket war, not as a 40k shield-station label. Unofficial summaries keep the Ultima parent and leave Thramas under aegis-subsector.